Bucket-elevator



(No Model.) I J. GAVANAGH BUCKET ELEVATOR Patented May 14, 1895.

Inventor Joseph (Javarza L,

byhzbflfitor y; W am Witnesses we norms wr'zns 00.,PNOTO-LIYHCL,wasumomn n c UNITED STATES PATENT OFFICE.

JOSEPH OAVANAGH, OF ASHBOURNE, ASSIGNOR .TO THE LINK BELT ENGI- NEERINGCOMPANY, OF PHILADELPHIA, PENNSYLVANIA.

BUCKET-ELEVATQ R.

SPECIFICATION forming part of Letters Patent No. 539,350, dated May 14,1895. Application filed November 8, 1894. Serial No. 528,198. A (Nomodel.)

To all whom it may concern.-

Be it known that I, JOSEPH CAVANAGH, a citizen of the United States, andaresident of Ashbourne, Montgomery county, Pennsylvania, have inventedcertain Improvements in Bucket-Elevators, of which the following is aspecification. t

The object of my invention is to so construct a bucket elevator that thebuckets will be guided and will not fall in the event of the chainparting, but will simply rest one upon another as fully describedhereinafter, reference being had to the accompanying drawings, in which-K Figure l is a side view illustrating my invention. Fig. 2 is a frontview. Fig. 3 is a perspective view of one of the buckets adapted to theguides; and Fig. rt is a sectional plan view on the line 4: 4, Fig. 1.

A is the driving shaft.

B is the driving wheel havingin its periphery a groove; adapted toreceive the blocks (1 of the chain D. This chain is known as the Dodgechain. The links 01' of thechain, in the present instance, do not bearupon the wheel, the contact being simply with the block d. The drivingwheel B has a smooth face, the sprockets usually employed to engage thechain being dispensed with and the chain is driven by friction.

It has been found in practice, that particles of coal or rock willbecome fastened in the links of the chain and will jam in the sprocketsof the sprocket wheel when used; and the wear upon the sprockets of thewheel will be such that in a very short time the sprockets will break,but by driving the elevator by friction, this difficulty is entirelyovercome.

The conveyer is what is termed a single chain conveyer, that is, thebuckets E are hung upon a single chain, the blocks having wings whichare secured to the buckets. A single chain bucket will have the tendencyto swing and 1 preferably mount at each side of the elevator guides HH,forming slide ways h h and I secure to each side of each bucket,

in the present instance, angle iron e forming flanges which extend intothe guide ways h, of the guides H; so that the buckets will be confinedand will not twist either on the upward or downward run.

The angle irons e extend preferably from the bottom to the top of thebuckets E, and the buckets are so arranged that there is very littleclearance between them. The object of this is that, in the event of thechain parting, the buckets will simply drop a very short distance, andrest one upon another-in the guide ways, and if the break should occuron the elevating run, the part below the break will fall a slightdistance and the upper portion will be carried over until the bucketsrest one upon another in the descending run, and the portion of theconveyer still resting upon the friction wheel will not be jammed as thewheel will simply turn without moving the conveyer. Thus, this devicewill prevent serious accidents which might occur if the buckets were.not so arranged that they would rest one upon another in guide wayswhen the chain parts, and by having a smooth drive wheel the chain willnot be thrown over the wheel and jammed, as would be the case ifsprocket wheel was used.

It will be'understood that the wheel may be ofa different design fromthat shown in the drawings and short guiding fiangesmay he used, thebuckets in this event resting one upon another, or the flanges on thebuckets may be made of simple plain bars, or may be driventhereby,buckets secured to said chain, In testimony whereof I havesigned my flanges on eaehside of the buckets, upright name to thisspecification in the presence of guides within which the flanges travel,said two subscribing witnesses.

flanges extending the full height of the bucket, JOSEPH CAVANAGH. 5 sothat the series of buckets will be supported WVitnesses:

by the flanges if the chain should part, sub- WILL. A. BARR,

stantially as described. JOSEPH II. KLEIN.

